158 Part I11.—Sixteenth Annual Report 
(1) The months in which 
the capture of Deca- } Jan. Feb. Mar. Aug. Sept. Oct. Nov. Dec. 
poda are recorded 
Number of records for 
each of the months i ee 26 2 7 \| A at 
for the seven years 
(2) The Stations where 
the Decapoda were Ree TEL. (LV 2 Va Vala 
captured 
Number of records for } of Atha 5 13 7 3 
each station 
The number of records for February alone is 17, or 27 per cent. of the whole;. 
and the number for the five colder months, January, February, March, 
November, and December, is 35, or fully 76 per cent. ‘The reason that 
these Decapods are found usually in the bottom tow-nets, and not in those 
worked at the surface, is that they are veritable bottom feeders ; and were 
it not for their peculiar habit of springing upward as well as backward 
when disturbed, their capture would be much less frequent. When any 
suspicious object is approaching these Crustaceans (I refer to the Carida 
or “shrimp” group) they face round towards it and intently watch its 
movements, and at the same time swim gently backwards, or they may at 
once bury themselves in the sand or mud. If the danger, however, 
should approach them suddenly, they spring quickly backwards and also 
obliquely upwards, and it is then that they come within the sweep of the 
bottom tow-net. But though the occurrence of these organisms in the 
bottom tow-net may be thus more or less satisfactorily explained, the 
reason for their being captured chiefly during the colder months seems to 
be less easy of explanation. It may be observed, however, that only five 
of the records are for the inshore station, and that about half of the total 
number are for Stations III. and V., the two stations in the middle of the 
estuary, the one extending east from Inchkeith the other west from May 
Island. 
(6) ScHIzopoDa. 
The Schizopoda are well represented as regards the number of species, 
and a few of them, especially those of the Euphausiide, appear to have 
been at times pretty numerous at the station under consideration. The 
Schizopods referred to in the records and distinguished by their names are 
the following :—* 
EUPHAUSIID&. 
Boreophausia raschit (M. Sars). Thysanoessa neglecta (Kroyer). 
MYSID&. 
Siriella jaltensis, Czern. (=Siriella Leptomysis gracilis, G. O. Sars. 
crassipes, G. O. Sars). a lingoura, G. O. Sars. 
»  armata (M. Edw.). Heminysis lamornee (Couch). 
Gastrosaccus spinifer (Goés). Macropsis slabbert (Van Ben.). 
Heteromysis formosa, 8S. I. Smith. Praunus flexwosus (Miiller). (= 
Lrythrops goésit, G. O. Sars. Mysis chameleon, Varg.).. 
Mysidopsis didelphys (Norman). 5,  enermis (Rathke). 
" gibbosa, G. O. Sars. Schistomysts spiritus, Norman. 
m angusta, G. O. Sars. i ornata (G. O. Sars). 
Neomysis vulgaris (J. V. Thompson). 
* The names and their arrangement are in accordance with Rev. A. M. Norman’s. 
revision of the British Schizopoda, published in the ‘Annals and Magazine of Natural 
History’ for June, August, and September 1892. 
